Method for manufacturing a light guide plate mold and a light guide plate

Abstract

A method for manufacturing a light guide plate (70) includes: providing a first substrate (30); coating a photo-resist (600) on the first substrate; exposing the photo-resist using a photo mask; developing the photo-resist; anisotropically dry etching the first substrate; removing remaining photo-resist (640), thereby providing a mold (40); providing a second substrate (50) and a hot-embossing machine (80), and conducting hot-embossing of the second substrate using the mold and the hot-embossing machine, thereby providing the light guide plate. By using the above-described dry etching and hot-embossing methods, a pattern of the photo mask is precisely transferred to the first substrate and the light guide plate. A diameter of the each of micro-dots formed on the light guide plate is as little as 10 nanometers. Thus a uniformity of luminance and color provided by the entire light guide plate is improved.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the invention [0002] The present invention relates to manufacturing of light guide plates, and particularly to a method for manufacturing a light guide plate using a duly manufactured mold. [0003] 2. Description of the Prior Art [0004] Liquid crystal displays (LCDs) are now in wide spread use in various applications; for example, in desktop computers, portable computers, LCD televisions, portable telephones, etc. An LCD can not itself emit light. A light source system such as back light system is needed for emission of light. A light guide plate is an important part of a back light system, because it controls uniform directionality of emitted light. [0005]FIGS. 8A to 8K represent a conventional process for manufacturing a light guide plate, as disclosed in U.S. Pat. No. 6,522,373 issued on Feb. 18, 2003. The process includes the steps of: [0006] a) applying a primer on a silicon substrate 10 covered with a silicon oxide (SiO2) film 11 t...

AI Technical Summary

Benefits of technology

[0019] An object of the present invention is to provide a method for manufacturing a light guide plate which is relatively simple and not unduly time-consuming, said method including a method for manufacturing a mold.

[0020] Another object of the present invention is to provide a method for manufacturing a light guide plate such that the light guide plate can deliver enhanced uniformity of luminance.

[0022] By using the above-described anisotropically dry etching and hot-embossing methods, a pattern of the photo mask is precisely transferred to the first substrate and the light guide plate. A diameter of each of micro-dots formed on the light guide plate is as little as 10 nanometers. Thus a uniformity of luminance and color provided by the entire light guide plate is improved. Furthermore, no electroplating steps are needed, unlike in the prior art. This saves much time and money.

Problems solved by technology

This saves much time and money.

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